渤海湾盆地花岗岩潜山纵向分带综合识别研究——以渤海PL花岗岩潜山为例

Comprehensive Identification of Longitudinal Zoning of Granite Buried Hills in Bohai Bay Basin—Taking PL Granite Buried Hill in Bohai Sea as an Example

摘要: 随着渤海湾盆地油气勘探的深入，越来越多的花岗岩类基岩潜山油田相继被发现。有别于常规碎屑岩地层发育受控于可容纳空间与沉积物供给(A/S)，花岗岩原岩致密、单一，储层的形成受控于风化作用，纵向分带难度大，严重制约着地质模式等基础工作的开展。本文依托渤海最大的花岗岩潜山-PL潜山，综合利用测井、钻录井、分析化验等方面的资料，以及XRF元素录井和INPEFA频谱属性分析等技术手段，形成了一套新的潜山分带界面识别技术方法，在实际应用中取得了良好的效果，有效支撑了潜山地质模式的建立。

Abstract: With the deepening of oil and gas exploration in Bohai Bay Basin, more and more buried hill oil-fields of granite bedrock have been discovered. Unlike conventional clastic rocks, the develop-ment of strata is controlled by accommodation space and sediment supply (A/S). Granite proto-liths are compact and single. The formation of reservoirs is controlled by weathering, so the ver-tical zoning is difficult, which seriously restricts the development of basic work such as geological model. Based on the largest granite buried hill in the Bohai Sea-PL buried hill, this paper synthetically utilizes logging, drilling and logging, analysis and laboratory data, as well as XRF element logging and INPEFA spectrum attribute analysis, and forms a set of new identification technology of buried hill zoning interface, which has achieved good results in practical application and effectively supported the establishment of buried Hill geological model.